Ribbon-feeding mechanism.



J. S. DUN 0 AN. .RIBBON FEEDING MECHANISM.

. APPLICATION FILED-APB. 6, 1910. 970,028. Patented Sept.13,1910.

6 SHEETS-SHEET 1.

J. S. DUNCAN.

RIBBON FEEDING MECHANISM.

APPLICATION FILED APR. 6, 1910.

Patented Sept 13, 1910.

' 6 SHEETS-SHEET 2.

J.S.DUNGAN RIBBON FEEDING MEOHANISM.

APPFIQATION FILED APB-.6, 1910.

5 SHEETS-SHEET}.

J. S. DUNCAN.

RIBBON FEEDING MECHANISM.

74 I r I J.- S. DUNCAN.

RIBBON FEEDING MECHANISM. APPLICATION FILED APR. 6, 1910.

' 970,028. Patented Sept 13,1910.

BEBEETE-EHEET a.

. To all whom it may concern: I

UNITED STATES PATENT ()FFICE. aosrirn s. DUNCAN, or CHICAGO, ILLINOIS,ss'sxsnon 'ro knnrmssoenarn COMPANY,

or crncaeo, IL INoIsa conronarron 0 ILLINOIS.

\ RIBBON-FEEDING MECHANISM.

Be it'known that I, JOSEPH S.-D UNoA-N, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Ribbon-Feeding Mechtion.4 V

Thisinventioi relates in general to rib bon "feeding mechanisms and moreparticu larly tomechanisms of this kind which are adapted for useinconnec'tion with addressing machines.- In machines of this characterthe addresses are setup in type in suitable holders or produced onplates and fed one at aftime from a magazine to a printing anisi'ns,ofwhich the following is a specifica position.

with the printing plate It is an object of my invention to provideimprovedm eans for feeding andreversing the direction of the feeding ofthe inking I ribbon.

Another object of my invention is to so ada t the ribbon feedingmechanism that it sha 1 be capable of use in connection with'amachine'em'ploying rotary platens, between which the inking ribbon andthe printing plates are adapted to be fed; and to preventabrasion of theribbon bythe rotating latensI have provided mechanism wherey the ribbonrollsma be moved bodily tween the platens at the time that the printingoperation takes place. 1

Still another object of my invention is to provide simple and effectivemeans for reversing the feeding operation when the ribbon shall havebeen substantially exhausted from one of the ribbon rolls.

- all sliding frictional resistance is obviated.

Still another object is to so mountuthe ribbon rolls that they shall becapable of independent transverse'movement in a vertical plane, and tor-ovide mechanism which shall be control ed by the position of the rollsto set-in operationt-he feed reversing mechanism.

Additional aims and objects wili become Speciflcati on of LettersPatent. Patented Application filer Apri1 6, 1910. Serial No. 553,738. I

the m Sept. '13, 1910.

apparent asthe invention is better under:

stood by reference to the following description when taken in connectionwith the ac-. eompanying drawings illustrating a preferred embodimentthereof.

Referring to the drawings-Figure 1 ,is a plan View showing as much ofthe addressmg machine as is considered necessary for an understanding ofthe adaptation andoperation of the invention. .Fig. 2 is-a sideelevation looking toward the leftxin Fig.1. Fig. 3 is a section on theline 33 of Fig. 1. Fig. 4 is a section similar to Fig. 3"but showing theribbon feeding and reversing mechanisms in a different position. .:Fig.5 is a detail elevation of the doublecam and levers for impartin areciprocatory movement to the rlbbon Feedingmechanism. Fig.

6 1s a view similar to Fig. 3 with some of the parts omitted, andshowing the parts in a position assumed during the reversingoporation.the reversing operation as completed. Fig. 8- is a sectionon the line 88of Fig. 1. Fig. 9 is a section on the line 99 of Fig. 3, and, Fig. 10 isa section on the line 10'10 of Fig. 1. 3

-,In the articular embodiment of the invention il ustrated in thedrawings, 11 represents the frame of the machine at the delivery endthereof; 12 is a portion of the, frame between the printing mechanismand the magazine (not shown); and 1313 are side pieces connecting themagazine and de livery end 'of the machine, "and provided ,with agrooved track in which the chain carrier 14 is adapted to travel. r Theprinting plates, which may be of any "well known'type upon which theaddresses are provided, are stacked in a magazine (not shown) at theright end of the machine, and .2, and are carried by'the chain carrier14 provided with suitable engaging members disposed upon its upper side,from Fig. 7 is a similar view showing azin'e at regular intervals,beneath the inking ribbon 15 and. between the upper and lower platens l6and 17, respecth ely. The envelope or other articles to be printed arefed between the upper platen and the inking ribbon simultaneously withthe pasv 'sageof a printing plate between the platens,

in printing position one above the other.

The upper platen is carried upon a drive shaft 20 having a spur-gear 21secured upon one end thereof, preferably by a set-screw 22. The lowerplaten is secured upon the shaft 23 having the gear 24 which is drivenfrom the gear 21 through the intermediary of the idlers 25 and 26, asshown in Fig. 2.

The gears connecting'the upper andlower platens are so proportioned thatthe platens rotate at the same rateof speedto bring the printingsegments 18 and 19 in alinementone with the other at each rotation'ofthe platens. The carrier chain 14 is driven at the same linear speed asthe perimeters of theplatens between which it runs by means of asprocket wheel 27 secured upon the shaft 28,. which shaft is driven bymeans of agear 29 adapted to mesh with the idler 26..

All of i the above mentioned shafts are mounted in suitable'bearings inthe side members of they machine frame.

\ The ribbon 15 is wound at either end 11 onrear roll 30 and a frontroll 31. he movement of the ribbon andthe rolls bodily with the printingplate during the printing operation, is accomplished by mounting therolls in a frame which is supported so as to be capable of a'reciprocatory movement. The frame comprises the longitudinallyextending side members 32, Figs. 3, 1,8, and 9, secured at their forwardends to the end member The. end member 33 comprises .a flat base portionhaving upwardly ex tending arms 34L. at its forward side, providingbearings for the rod 35 upon which is pivotally supported the frame 36having forwardlyextending arms 37 and 38 be tween which the roll 31 isrotatably mounted. lt willbe evident that the roll is capa-- ble of aswinging movement in a vertical The. plate 33 is provided at either sideon its lower surface, with flat bearing portions plane about the rod 35as a center.

adapted to rest upon and be supported by thecurved shoes 39 upon the.upper end of the supporting arms 40, pivotally mounted at l1 on theframe of themachine so as to be eapaliple of an oscillatery movementabout their pivotal bearings. In order to main.- iuinithe launche 33imposition upon the shoes 39 inks areprovidedwhich are piveiuilyrftll'llltumriiul' fi the shoe at 43 and to jections $6 from thesupporting arms 40,

.yieldingly retain the member 33 in position upon the shoes 39 whilepermitting a slight vertical movement as the arms oscillate back andforth. The shoes39 are curved substantially on an arc struck from thepoint 41 as a center so that the members 33 reciprocate substantially ina right line as the sup porting arms oscillate back and forth.

The end member 34 which is secured to the other ends of the side members32, is likewise provided with upwardly extending portions 47 serving asbearings ,'for the frame 48 ,pivotally mounted therein and havingrearwardly, extendingarms 49 be tween which thefroll 30 is rotatablymount ed. The end member 34 is alsoadapted to be carried upon the upperends of arms. 50 secured upon the rock-shaft 51, which is mounted tooscillate in' bearings in arms 52 extending downwardly from the mainframe of the machine, as shown in Fig. 9. A (:01- lar 53 secured uponthe rock-shaft by means of a set-screw 54 prevents the shaft from ingFig. 9. The arms 50 are provided with curved shoes 55 at'their upperends upon longitudinal displacement to the right, view- 1 which thelower surfaces of-the end member 34 are adapted to be supported.v Theshoes and the member 34: are connected to gether by links 56 pivoted tothe shoes at 57 H springs 59 secured'to the end member at 58 1 and tothe supporting arms at 50,. yieldingly maintain the end members and thesupporting arms in eotiperative relation.

It will be evident that an ,oscillatory .movement of the arms 40 and 50about their pivotal centers, will impart a reciprocat'ory securedthereon" a double cam comprising the 'member 65 adaptedgto coiiperatewith the arm 61' and the memberfifi adaptedto cooperate withthe arm 63..a The cams are so shaped that they will impart positive oscillationtothe rock-shaft 51 throughsthe double-armed lever mounted .on the shaft.

and to the end member at 58, and tension The double cam is adjustableupon the shaft 23 and is normally held adjusted position by theset-screw 67.- The/cam, when properly adjusted, is adapted to impart anoscillatory movement to the shaft 51in a counterclockwise direction;thusmoving theinking ribbon andv rolls to the left, viewing 1' I 1104:,at the timethat the segments 18 and 19 on the platens are in printingrelation one to the other. After the printing segments have separated inthe further rotation of the platens, the double-cam returns the inkingribbon and rolls to their normal position shown in Fig. 2.

At each reciprocation of the ribbon rolls, as above described, theribbon is fed from one roll onto the other by the mechanism which willnow" be'described. A curved link 68 is 1 pivotally mounted at one end onthe frame sionspring 74: secured to the pawl at one end and to a lateralextension 75 from the link at its other end. It will be evident that asthe ribbon is moved to the left from the position shown in Fig. 3, thatthe roll 30 will swing in an are about the lower end of the link 70, andthat the pawl 73 will slide back over the teeth of the ratchet-wheel 72until it assumes the position shown in'Fig. 4, when the ribbon carryingframe has reached the extreme limit of its movement toward the left.When the frame is moved to the rightfromthe position shown in Fig. 4,the ratchet-wheel traveling .in a greater are than the pawl 73, will berotated by the pawl, thereby winding the ribbon from the roll 31 ontothe roll 30. A curved link 76 is pivotally connected at one end to thelink 70, and is pivotally attached at its other end to one end of a link77 loosely mounted on the shaft 78 carrying the roll 31. A pawl 79 ispivotally mounted upon the pin 80, connecting links 76 and 77 and isnormally held in operative engagement with a. ratchet-wheel 81 securedupon the shaft 78 by a spring 82 (Fig. 1), engaging with an armextending outwardly from the pawl. The oscillation of the link about itspivotal connectionwith the link 68, will impart a similar oscillatorymovement to the link 77 through the intermediary of the connecting link76, and the pawl 79 engaging with the teeth of the ratchet-wheel 81,will rotate the roll 31 to wind the ribbon thereon at each oscillation.

Since the pawl 73 is adapted to actuate,

the roll 30 to wind the ribbon thereon from the roll 31, and the'pa'wl79 is adapted to actuate the roll 31' to unwind the ribbon from the roll30 and onto the roll 31,. it is necessarythat one of the pawls bema1ntained in inoperative -position during the winding operation bytheother pawl. For the purpose of alternately permitting the operation ofthe Ie-s} )i:Ct1Ve pawls to wind Upon the shaft 71 outside the ratchet--wheel 72, there is pivot-ally mounted "a. bell crank member 83, the endof one arm being projected laterally to provide a bearing shoulder 84,the other and shorter arm being'pivotal-ly connected to a link 85 havingits end bent outwardly, as'at 86, into'the' plane of an abutment pin 87flattened on its front face, as at 88, which is secured in a. hollowstud 89 on the main frame by means of a set-screw 90. The abutment pinmay adjusted vertically by loosening the setscrew 90 to bring the upperend of the pin to the proper height. A cam sector 91 is made integralwith the bell-crank member and isadapted to engage with a'laterallyprojecting pin 92 on the pawl 73- to withdraw the pawl from engagementwith the ratchet-wheel 72, when the: bell-crank member assumes theposition shown in Figs. 3

and 4. The other. end of thelink 85 is piv' ot'ally connected to theshorter arm of a bellcrank member 93, loosely mounted on the shaft 78carrying the ribbon roll 31, the

outer end of the longer arm of the bell-crank member being laterallyprojected at' 93 to provide a bearing shoulder similar to the shoulder8i on the bell-crank member The bell-crank *member 93 is also providedwith a cam sector 94 adapted'when the bellcrank .lever is rotated-intothe position shown in Fig. 7, to engage with the laterally projectingpin'95 on the pawl 7 9, andmaintain said pawl out of operativeengagement with the ratchet-wheel 81. An abutment pin 95 having a Hatrear surface 96, isadjustably held in a socket .97 by means of aset-screw 98, and is disposed in the'path of thefoutwardly bent'end 99of the link 85. l

A tension spring 100' is connected at one end to a laterally extendinglug 101 on the long arm of the bell-crank lever,"and at its other end tothe end of the rod 35. This spring is adapted to maintain the reversingmechanism in either the position shown in F ig.. 3 or the position shownin Fig. 7. \Vhen the parts are in the position shown in Fig. 3, theshoulder 84 engaging with the top of the link 85 prevents furtherrotation of the bell-crank members under the influence of the spring100, and when the parts are in the position shown in Fig. 7, the

shoulder 93 on the-bell-crank member 93 performs a s milar function andprevents shown in Fig. 3, thereversing mechanism being held in thatposition by the spring 100, the cam 94 is withdrawn from beneath thepawl 79, permitting it to engage with the teeth of the ratchet-wheel 81,while the forward movement in the oppositedi'rection under the influenceof the'spring 100. Assumlng the parts to be in. the position.

cam 91 on the bell-crank'member 83 is in engagement, with the pin 92 onthe pawl '73 withholding-it from operative engagement with theratchet-wheel v72. As the whole feeding mechanismis now moved to theleft by the oscillation of the rock-shaft 51, the ribbon rolls 30 and 31which are relatively fixedly mounted on the ribbon carrging frame, movea greater distance than t e pivotal connection between the links 70 and76. -Since the link 76 is pivotal! .oon-

nected to theouter end ofthe link 7 and since the pawl 79 ismounted atthe pivotal connection 80 between these two links, it will be evidentthat the roll 31 will travel to the left farther relatively than thepoint 80, and the arts will assume the position indicated in ig. a, thepawl 7 9 having been moved in.:a clockwise direction, looking at Fig. 4,relatively to the ratchet-wheel 81. When the ribbon carrying mechanismis now moved to the right, the ratchet-wheel ,81

' ported u on the transversely extending portion of t e member 47 uponwhich the tom. of the roll rests. wound from the roll it graduallydecreases in size audits shaft 71 swings downwardly about the pivotalpoint 48". The height of the abutment pin 87 is so adjusted that theoutwardly bent end.86 of the link 76, will pass over the end of the pinas the ribbon carrying mechanism reci rocates, until thebell-crankmembers 83 and 93 will be turned llpon their axes from thepositionshown in l 3 to the position shown in Fig. 7. Fig. 6 s owstheposition of the parts after the ribbon on the roll 31 has iecomepracticall exhausted. The shaft 71has lowered su ciently upon thepractical exhaustion of the ribbon, to bring the outwardlybent end 86below the topof the abutment pin 87f As be evident from-the drawings,the top of the pin is slanted rearwardly so that if the end 86 should enage with the top of the pin when the mec ianis'm is moving toward theright, it will simply slide up'over the pin and drop ofi withoutproducing any re sult. 'If, however, the end 86 engages the flat frontface of the abutment 87 when the mechanism istraveling towardthe left,the

bentend 86has enga' d the abutment and the mechanism is sti movingtoward the left, the reversing operation having been partiallycompleted. The turningof the velo of the present invention. 1 the ribbonis un- I adapted to 006 bell-crank members on their axes withdraws thecam 91 from operative engagementwith the pawl 7 3, permitting it toengage with the teeth of the ratchet-wheel 7 2, while the movement ofthe. bell crank member 93 brings the cam '94: into operative engage mentwith the awl 79 and raises it from its operative relatlon to theratchet-wheel 91. As the ribbon carrying frame continues toreciprocatc,the ribbon will now be wound from the roll 31 onto the roll30 by means of the pawl 73 cooperating with the ratchet-wheel When theribbon has been practically all wound u on the roll 30 and the roll 31is substantia ly exhausted, thebent end 99 of the link 85 will'belowered-sufliciently to engage the rear faced the abutment pin 95' inthe same manner that the bent end 86 engages the front face of theabutment pin 87 upon depletion of the roll 30. Engagement the bent end99 with the abutment 95, before the ribbon feeding mechanism has reachedthe limit of its movement to the right, will move the parts from theposition shown in Fig". 7 to the position shown in Fig. 3, thusreversing the ribbon feeding operatic. f I v f The envelope or otherarticles to be printed may be supported in front of the upper platen inany suitable manner, and may be automatically fed between the platens,or

theymay be manually inserted therebetween, the particular means fordelivering the en-. to feeding position forming no part I have shown, 1and 10, mechanism rate with the 11 per platen roll to draw 't e envelopeor otherarticles into printing position after they have been placed infeedm position,

Beferring to 1%. 10, the shaft 23 has suitably mounted t ereon, a cam102 which s maintained in 'adipsted position by means of a collar 103whic en ges with the shaft and is held in position t ereon by means ofhowever; m Figs.

a clampmut 104. A frame 105 pivotally.

secured to the main frame of the machine 106, 1s provided at one endwith a roll 107 adapts to travel upon the cam 102. A plurahty of feedin,rolls 108 are carried upon a shaft 108 in t e frame beyond the pivotalpoint 106, so that. they will be yieldingly pressed against the faceofthe platen 16 by l the tension spring 109 whenever the roll 10 7 1 ridesinto the low part of the cam 102. The shaft 108' is driven by agear 113securing the outer end thereof and meshing with an idler 11 1 integ gilwith an idler 115' adapted to be driven m the gear 24. In order topermit the movement of the rolls 108toward and from the platen, thatpart of the shaft 108' between the frame 105 and the bearing 116 on themain frame, is composed of a series of'universal connections to give therequired flexibility thereto. A pluralprinting segments of the platensare-post tioned in the proper relative relation. The

cam 102 is so adjusted onthe shaft that the low part thereof will passunder -.the roll 107 just before the printing plate carried by thecarrier chain enters between the platens. The frame .105 is rotated u onits pivots 106 by the spring 109 to bring the roll 108 into engagementwith the platen to feed an envelop forward, and simultaneously.

the inner end of the curved fingers are withdrawn from engagement withthe platen by the lifting ofthe rod 111 as the frame 105 is tilted.

.It will be obvious that the printing segments of the platens, theenvelops,v the rib boil, and ribbon feeding mechanism, and

the printing plateon the carrier chain, all move. rearwardly during theprinting operation at the same rate of speed. After the printingoperationthe envelop is delivered by any .suitable mechanism to adelivery rack or carrier. I have shown for the purposes of illustrationmerely, a portion of a delivery mechanism comprising a plurality ofbelts 116 passing around rolls on on the shaft 23 and engaging with thelower side of the upper platen. .The envelops when fed from the platenwill be carried by the belts and delivered to any suitable rece tacle. y

\ hilezI have shown-and described a preferred embodiment of myinvention, it will be obvious that various minor mechanical changes maybe resorted to without depart in from the spirit of the invention orsacri cin any. of the material advantages thereof. I I

What I claim is:

1. In a ribbon feeding mechanism, the

combination of apair of ribbon rolls mounted to move in a'directiontransverse to their axes, means for feeding the ribbon from one rollontothe other, and means con trolled by the position of the rolls forreversing thej feeding-operation.

2.- In a ribbon feeding deviee, the combination of a pair of ribbonrolls, pivotally mounted frames in which said'rolls are rotatablymounted whereby the rolls are-ca pable of movement about theframe-pivots,

' means forfeedingth'e ribbon from': one roll onto the other,

and means for reversing the .feedin operation upon subs tantialdepletion 0 onejof the rolls In a ribbon feeding mechanism, the

combination of a pair of ribb .nrolls,"pivotally mounted frames in whichsaid rolls are journaled, whereby each roll is capable of independentmovement ina direction transverse to its a x is'fmeans for feeding theribbon from one roll onto, the, ot'her, and means controlled 6 relativepositions snag the ribbon feeding of the rolls for revs: operation- 4.In a ribbon reeding mechanism, the combination'of a pair of ribbon;rolls, pivotally mounted frames in which. said rolls are mounted,=plates upon which said rolls are adapted to rest, means for feeding theribbon from one roll' onto the other, and means controlled bv theposition of the axis done of said rolls relativelyito' its plate forreversing the feeding operation.

In a ribbon feeding mechanism, the

combination of a pair ofrlbbon rolls mounted so as to be capable ofmovement tran'sversely of the path of travel of the'ribbon, means forfeeding the ribbon from one roll onto the other, means adapted to movewith said ribbon rolls for reversing the feeding operation andstationary means for actuating said reversing means. i

6. In a ribbon feeding mechanism, the

combination of a pair of ribbon rolls, shafts therefor, means forfeeding the ribbon from 'one roll onto the other, and means for reversinthe feeding operation, comprising a mem er pivotally mounted on eachribbon roll shaft, aconnection between said mem-,

bers, and a stationary device ada ted 'to 'turn'said members on theribbon'rol shafts.

7. In a ribbon feeding mechanism, the

combination of a movable frame, a pairof ribbon rolls mounted thereon,means for feeding the ribbon from one roll onto the other, comprising aratchet-wheel mounted on a ribbon roll,'a pawl adapted tofactuate saidwheel, means for operating said pawlv and means for reversing thefeeding-operation, comprising amember pivotallyg mounted on the ribbon;roll shaft and. adapted-to raise said pawl outofengagement with saidratchet-wheela'nd astationa'ry device for operating saidpawl raisingmeans,

'8. Inaribbon feeding mechanism," the combination of a pair of ribbonrolls, means for intermittently feeding the ribbon from one roll ontothe-other, and means for movmg said. rolls transversely of their axes ina direction parallel with the direction of I travel of the ribbon 9. In.a ribbon' feedin'g mechanism, combination of a frame, a pair of ribbon"rolls, and means for pivotallvsupporting said *rolls on "said frame sothat theyg. are.

capable of movement in a directionfparallel with and in' a directiontransverse to the path of travel of the ribbon.

10. In a ribbon feeding mechanism, the combination'ofja pair of vribbonrolls, means for. supporting sa drolls, said means being *capable'ofmovementwith the'rollsin a di rection transverse to the path of movementof the= ribbon,ffand"means for moving said rolls simultaneously in adirection parallel t the ribbonand mechanism dependent upon the position,of the rolls for. reversing the I'lbbOIl' feeding operations I Q 12; Ina ribbon feeding mechanism, the

combination of a pair of ribbon rolls, means for moving the rolls withthe ribbon thereon, bodily transversely oftheir axes, in a directionpar'allelwith the path of travel of the ribbon,i.means for actuatingsaid rolls to wind the-ribbon fromone roll ontothe other, andmeans for'reversingthe winding operation.

. 13.' In aribbon feeding mechanism,

combination of avpa-ir of ribbon "rolls, a pair of pivotally mountedframes inwhich said rolls are rotatably mounted, means forrotating saidrolls to wind the ribbon from one roll; onto the otherjand means; forreg; clprocatlng said-rolls, bodily, in a direction transverse to theI'OllS.-- y

longitudinal axes of said 14. In a ribbon feeding' mechanism, the

combination of apai r of ribbon rolls, means for feeding the ribbon fromone roll onto the other, means for moving said rolls and ribbon'in adirection transverse to the lon tudinal axes of said rolls, and means idr reversing the ribbon feeding operation. v

15. aribbonxfeeding mechanism, the combination of a pair of ribbonrolls, means for feeding the ribbon from one -roll onto the other, meansfor reversing the feeding operation, all carried upon a' frame, meansfor actuatingsaid reversing mechanism, and means for reciprocating; saidframe in the plane of travel of the ribbons i I 16. In aflribbonlfeedi'ng mechanism, the

combination of a frame, 'a plurality of 0's cillatorygsupporting"'armscarrying said frame, a 'p' 1r of ribbon rolls, means for feeding the.;ribbon"from one roll onto the other, and feed reversing mechanism, all

mounted on said frame, means for reciproeating-said frame longitudinallyof the ribopera bon and stationary means adapted to ate said reversingmechanism.

17. In aribbon feedig mechanism, the combination of a ribbon, roll, aratchet wheel secured to-said roll, a link pivotally mounted at one endon the ribbon roll shaft for,

ing the printingvertical plane,

and pivoted to a swingin member at its other end, a pawl carried y, saidlink and adapted to engage with the ratchet-wheel, and means for movingtheribbon roll rela 'tively tothe pivoted end of the'link, where by apartial rotation is given to said roll by the pawl carried on the link,

i 18. In a ribbon feeding mechanism, the combination of a ribbon roll, ashaft therea ratchet-wheel carried thereby, a link pivoted to the rollshaft, a pawl carried by said link and adapted to engage'with saidratchet-wheel, and a cam loosely mounted on the ribbon roll shaft andadapted to be turned to a position to engage the pawl and withdraw itfrom operative engagement with the ratchet-wheel.

19. In a ribbon feedin mechanism, the combination of a pair of ribbonrolls mounted for movement indefpendently of H each other, a ribbon,means or feeding the ribbon'froni one roll onto the other, and means formoving the ribbon and rolls, bodily, dur operation in a direction Iarallel with the path of travel of the ribon. i i

i In a ribbon feeding mechanism, the combination of a pair of ribbonrolls, shafts therefor, pawl and ratchet means connected with said rollsfor feeding the ribbon. from one roll onto the other, and means forreversing the feeding operation by maintaining oneof the pawls out'ofoperative enwith its ratchet while permitting gagement the other'tocooperate therewith, comprising a plurality of cams mounted on the rib.-

bon-ro l shafts, a link connecting said cams,

means for yieldinglymaintaining said cams v v in one 1 of two positions,and a stationary abutment adapted to actuatesaid link to reverse theposition of the cams.

21,111 a ribbon feeding mechanism, the combination of a pair ofrlbbonrolls, means for feeding the ribbon from one roll onto the otherand a reversing mechanism, all

'mounted to reciprocate bodily on the machine frame, and astationaryabutment disposed in the path of reciprocation of the reversingmechanism and adapted to beengaged thereby, whereby to reverse the feed111g operation. a

22; "In a ribbon feeding mechanism, the combination of a ribbon roll,,a' pivotally mounted frame in which said roll is carried whereby theroll is capable of movement in a mechanism for rotating said roll, andmeans mounted upon the roll shaft for throwingou't of operation the-rollrotating mechanism,a1id means foryieldingly retaining said rotatingmechanism in either its operativeor inoperative position.

.23.; In a ribbon feeding mechanism, the

combination of a main frame, a second. frame mounted to reciprocatelongitudinally of the mainframe, a pair of ribbon rolls to the frame,from one roll mounted in said second frame so as to be capable ofindependent movement relatively means for feeding the ribbon onto theother, a stationary abutment on the main frame, and means carried uponthe ribbon roll shafts adapted to be brought into engagement with saidabutment during the reciprocation of the said second frame when one ofthe rolls is substantiallyexhausted, to reverse the 'feed- 10ingoperation.

' JOSEPH s. DUNC N.) Witnesses d WM. 0. BELT, M. A; KIDDIE.

